Use libsc v2.3.6 in CI

Author: cburstedde

.github/workflows/ci.yml

@@ -76,12 +76,12 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: true
-    - name: Fix libsc to version 2.3.5
+    - name: Fix libsc to specific version
       shell: bash
       run: |
         cd sc
         git fetch --tags
-        git checkout v2.3.5
+        git checkout v2.3.6
     - name: Run bootstrap script
       run: ./bootstrap
     - name: Install libsc with debug, without LAPACK and shared